Fuel cell



FIG. 1 is a perspective view of top, front and right side of a fuel cellshowing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof, the bottom view is identical thereto;

FIG. 7 is a perspective view of top, front and right side of a fuel cellshowing our new design of second embodiment;

FIG. 8 is a front view thereof;

FIG. 9 is a rear view thereof;

FIG. 10 is a left side view thereof;

FIG. 11 is a right side view thereof; and,

FIG. 12 is a top plan view thereof; the bottom view is identicalthereto.

The portions of the article in broken lines are shown for illustrativepurposes only and form no part of the claimed design.

The ornamental design for a fuel cell, as shown and described.